science
Grade-11
Easy

Question

Which disease or disorder is the result of having an extra chromosome?

  1. Cystic Fibrosis
  2. Hemophilia  
  3. Colorblindness
  4. Down Syndrome

hintHint:

The disorder causes trisomy of chromosome 21.

The correct answer is: Down Syndrome


    Down syndrome or chromosome 21 trisomy is a type of chromosomal genetic disorder. Chromosomal genetic disorder refers to change in the structure of a chromosome due to addition or deletion of chromosomal segments during cell division.
    In Down syndrome, the chromosome 21 will have an additional chromosome due to improper division during meiosis. The individual will posses problems in the nervous system and lack intellectual skills.

    • Down syndrome is also termed as trisomy 21
    • Individuals posses an extra chromosome at 21 position
    • Trisomy 21 is caused due to improper separation of chromosomes during meiosis
    • Cystic fibrosis is an autosomal recessive disorder
    • Color blindness is an autosomal dominant disorder
    • Hemophilia is a monogenic genetic disorder

    Related Questions to study

    Grade-11
    science

    Which disease or disorder is caused by the inheritance of two mutated alleles?

    • Cystic fibrosis results in breathing disorder of the affected individual due to increased thick mucus secretion
    • The disorder is caused due to alteration in CFRT gene
    • It is a type of autosomal recessive disorder, having both copies of gene altered in a cell
    • Other disorders mentioned are not autosomal recessive in nature

    Which disease or disorder is caused by the inheritance of two mutated alleles?

    scienceGrade-11

    • Cystic fibrosis results in breathing disorder of the affected individual due to increased thick mucus secretion
    • The disorder is caused due to alteration in CFRT gene
    • It is a type of autosomal recessive disorder, having both copies of gene altered in a cell
    • Other disorders mentioned are not autosomal recessive in nature

    Grade-11
    science

    Which of the following is NOT caused by a gene mutation?

    it is an example of chromosomal disorder.

    Which of the following is NOT caused by a gene mutation?

    scienceGrade-11

    it is an example of chromosomal disorder.

    Grade-11
    science

    Which of the following is NOT a chromosomal disorder?

    others are example of chromosomal disorders.

    Which of the following is NOT a chromosomal disorder?

    scienceGrade-11

    others are example of chromosomal disorders.

    parallel
    Grade-11
    science

    Which of the following is a sex-linked disorder?

    it is a sex-linked recessive disorder.
    The abnormal gene responsible for hemophilia a carried on the X chromosome.

    Which of the following is a sex-linked disorder?

    scienceGrade-11

    it is a sex-linked recessive disorder.
    The abnormal gene responsible for hemophilia a carried on the X chromosome.

    Grade-11
    science

    Which of the following has normal sex chromosomes?

    it occurs due to an extra autosome hence, sex chromosomes are not affected.

    Which of the following has normal sex chromosomes?

    scienceGrade-11

    it occurs due to an extra autosome hence, sex chromosomes are not affected.

    A pregnant woman who has done an amniocentesis test finds an extra Ban- body in her embryo. The syndrome which is likely to be associated with the embryo is

    scienceGrade-11

    The presence of an extra barr body due to the presence of an extra X chromosome causes klinefelter's syndrome.

    parallel
    Grade-11
    science

    Name the scientist who discovered the law of heredity:

    gregor mendel discovered the law of heredity.

    Name the scientist who discovered the law of heredity:

    scienceGrade-11

    gregor mendel discovered the law of heredity.

    Grade-11
    science

    A gamete contains which of the following?

    each gamete receives single allele of a gene.

    A gamete contains which of the following?

    scienceGrade-11

    each gamete receives single allele of a gene.

    Grade-11
    science

    All types of mutations are transferable among generations.

    Germ-line mutations occur in gametes which can be inherited while, somatic mutations cannot be inherited.

    All types of mutations are transferable among generations.

    scienceGrade-11

    Germ-line mutations occur in gametes which can be inherited while, somatic mutations cannot be inherited.

    parallel
    Grade-11
    science

    Mark the INCORRECT statement about mutation?

    mutation is not predestined.
    It occurs when DNA is damaged or an error occurs in a DNA.

    Mark the INCORRECT statement about mutation?

    scienceGrade-11

    mutation is not predestined.
    It occurs when DNA is damaged or an error occurs in a DNA.

    Grade-11
    science

    Damage and errors in DNA cause___________.

    damage and errors in DNA causes mutation.

    Damage and errors in DNA cause___________.

    scienceGrade-11

    damage and errors in DNA causes mutation.

    Grade-10
    science

    What is the evolutionary purpose of cells that undergo crossing over?

    What is the evolutionary purpose of cells that undergo crossing over?

    scienceGrade-10
    parallel
    Grade-10
    science

    When does chromosomal crossover occur?

    When does chromosomal crossover occur?

    scienceGrade-10
    Grade-10
    science

    Chromosomal crossover is the natural pairing up and exchanging of genetic material between

    Chromosomal crossover is the natural pairing up and exchanging of genetic material between

    scienceGrade-10
    Grade-10
    science

    Which of the following does not cause variation?

    Which of the following does not cause variation?

    scienceGrade-10
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.